OM646 DPF regen monitoring - if I have one...

[Northernsands]

Morning, all.

In a very short amount of time I've ended up with two OM646 MBs. An '07 Viano with ~158,000 miles, and an '09 C220 with ~64,000 miles. Given the relative high mileage of the former, and the relative low mileage of the latter, I feel it's important to understand what's going on with the DPFs, if they have them.

Viano:
WDF63981323278296

C220:
WDD2040082A241848

The Viano VIN decode makes mention of a particle filter, so I'm assuming that is a DPF. Nothing like that for the C220. Both are Euro 4, but I don't think that makes much difference.

Is there any hard and fast way to check? I'm pretty sure the Viano has one as there's a long pipe coming from the back of the "DPF", running forward. I'm assuming that's for the pressure differential sensor. The C220 is harder to get under, so I haven't done a visual inspection (though that needs to happen soon so I can check the rear subframe).

Assuming one, or both have a DPF, is there any way to monitor soot levels or DPF, CAT temperatures and what have you on these, to ensure they are regenerating correctly? I have a cheap ELM OBDII reader and Torque Pro, but the amount of information I'm seeing, at least on the C220 (haven't tried the Viano), is dissapointingly low and unreliable when there (I'm able to see much more on my '08 Subaru Outback 3.0). Most information on DPFs etc. only seeems to apply to the OM651 and newer, not the OM646.

I'll happily buy a better OBDII reader, such as the Autel AP200, but that's doesn't list DPF as a function on the OM646.

Any help or pointers greatefully received!

Many thanks.

 

[onefortheroad]

If the exhaust pipes are sooty , chances are you have a particle catcher and not a full on regen dpf system.

 

[Northernsands]

If the exhaust pipes are sooty , chances are you have a particle catcher and not a full on regen dpf system.

I'll have to have a look.

I have the C220 at work with me, so I actually thought I'd check for the DPF pressure sensor, but it's not there (I believe it's meant to bolt to the back of the air filter box). That makes me happy.

Just the Viano to check...

 

[Northernsands]

OK. From the VIN decode, code KA1 - Particle Filter, does mean a DPF according to parts diagrams.

So the Viano does have a DPF.

With that out of the way, does anyone know if the regen can be monitored?

In reference to the C220, I think it's VIN code 474 that would indicate a DPF, which mine doesn't list.

 

[sonic]

I am fairly sure Euro 4's dont have DPF's. Euro 5's do, & Euro 6's have AddBlue.

 

[onefortheroad]

OK. From the VIN decode, code KA1 - Particle Filter, does mean a DPF according to parts diagrams.

So the Viano does have a DPF.

With that out of the way, does anyone know if the regen can be monitored?

In reference to the C220, I think it's VIN code 474 that would indicate a DPF, which mine doesn't list.

It might mean dpf , but not a regenerative dpf as on a euro 6.

Your more likely to have a catalytic converter. A 639 490 17 14

 

[Northernsands]

For the C220. So VIN code 474 suggests it would have a DPF with pressure sensor, etc.. Mine doesn't have that VIN code, and no pressure sensor. Likely just the two stage Cats (as per the RHD image in the top left).

 

[onefortheroad]

For the C220. So VIN code 474 suggests it would have a DPF with pressure sensor, etc.. Mine doesn't have that VIN code, and no pressure sensor. Likely just the two stage Cats (as per the RHD image in the top left).

View attachment 91599

In a nutshell. Checking the exhaust tips for soot would of given you the same answer. More egr than regen dpf.

 

[M80]

Torque can show exhaust temperatures.
For more involved DPF info you need enter PID's. I've not had success with that.

I monitor the exhaust temp. As it rises above 525 C I know it's in regen'.

If you can get Torque to monitor 1st cat and 2nd cat, the 2nd cat is the DPF.

Icarsoft can see soot levels.

 

[Northernsands]

For the Viano. The VIN decode does state code KA1.

 

[Northernsands]

Torque can show exhaust temperatures.
For more involved DPF info you need enter PID's. I've not had success with that.

I monitor the exhaust temp. As it rises above 525 C I know it's in regen'.

If you can get Torque to monitor 1st cat and 2nd cat, the 2nd cat is the DPF.

Icarsoft can see soot levels.

I'll see what I can get to work. Thank you.

 

[Northernsands]

Torque can show exhaust temperatures.
For more involved DPF info you need enter PID's. I've not had success with that.

I monitor the exhaust temp. As it rises above 525 C I know it's in regen'.

If you can get Torque to monitor 1st cat and 2nd cat, the 2nd cat is the DPF.

Icarsoft can see soot levels.

Drove the Viano this morning. Torque Pro didn't pick up the Cats. Though the stuff it did pick up seemed more reliable than the C220.

 

[M80]

Though the stuff it did pick up seemed more reliable than the C220.

Could this be a difference with the BT senders, assuming you're using 1 for each?

I've had trouble with reliability from this type

Pardon our interruption...

So just leave this type plugged in now

Pardon our interruption...

Well that's what they look like at least.

 

[Northernsands]

Could this be a difference with the BT senders, assuming you're using 1 for each?

I've had trouble with reliability from this type

Pardon our interruption...

So just leave this type plugged in now

Pardon our interruption...

Well that's what they look like at least.

I was using the same dongle in each. I think I have another one somewhere, but I'd need to find it. I know these ELM clones can be flaky, but this one has been OK before.

I also have a USB ODBII cable which I used with FreeSSM on the Outback. But I don't know of any Windows software that would help in this instance.

Does anyone know if the Autel AP200 offers live views like Torque Pro does? Or does it work with Torque Pro directly?

 

[supernoodle]

Torque Pro uses the the OBD2 diag services (ISO 15031/J1979). Manufacturers have to support these services, but it's not prescribed how many of the PIDs (live data) they need to support. So you will find that on one vehicle you can read PID78 ( exhaust gas temp) but another even the same model but a different year it may not be supported.

The Autel AP200, assuming you use the MB specific plugin, uses the diag services as defined in ISO14229, which is what manufacturer tools use, including Xentry. The standard only details how to communicate between tester and module. The manufacturer decides what is available and how to decipher it
So it theory it could offer everything that Xentry does, but MB don't share this data, so third party tools only offer as much as someone could be bothered to reverse engineer. But it's certainly a step up from the OBD apps.

I recently purchased an AP200, considering it was only £55, I'm impressed so far.Yes it offers live views but for some reason like the other tools I've used on MBs it insists in offering data I groups, ie a group of labels for start and idle another for DPF etc.

 

[Northernsands]

If the exhaust pipes are sooty , chances are you have a particle catcher and not a full on regen dpf system.

Managed to get a picture of the Viano exhaust. Looks pretty clean, so that appears to support the notion that it does have a DPF.

 

[onefortheroad]

Managed to get a picture of the Viano exhaust. Looks pretty clean, so that appears to back up the notion that it does have a DPF.
View attachment 91618

Certainly.